How should I store my enzyme?

This product is stable for at least two years from date of manufacture if stored unopened between -15 to – 25°C. Internal studies have shown the reconstituted enzyme is stable as a frozen solution between -15 to – 25°C for at least 3 months. Additional studies have shown the reconstituted enzyme was successfully frozen and thawed at least twice without apparent loss of potency as assessed by the CDA and NPA assays. The product is shipped on dry ice to provide the most stable conditions during shipment.